Installation network card alfa networks

1-How do i install step by step each one of these cards on ubuntu 10.10? is any of the cards automatically driver installed?

2-How does the OS makes the management of the card ip¬¥s when each card conected to a diferent router wireless/diferent network conection? what happens after getting three ip¬¥s? do i use three diferent ip¬¥s?

There are instructions for installing the drivers from the card manufacturer...

When you are connected to multiple networks you will get an address for each network, your computer should send the traffic out of the network card that provides the shortest path to the destination provided by details that are logged into your routing tables that you can review by issuing the command route in the terminal.